#include <stdio.h>

/*Determine whether arguments can be multipled without overflow*/
int tmult_ok(int x, int y) {
  int p = x * y;
  return !x || p / x == y;
}

int main() {
  if (!tmult_ok(35, 58))
    printf("overflow!\n");
  else
    printf("okkk!\n");
  return 0;
}